Marasmius rotula, the pinwheel mushroom, is a fungus in the family Marasmiaceae. Widespread in the Northern Hemisphere, it was first described scientifically in 1772 by Giovanni Antonio Scopoli. The mushrooms are characterized by thin whitish caps up to 2.0 cm (0.8 in) wide that are sunken in the center and pleated with scalloped margins. The wiry black hollow stalks measure up to 8.0 cm (3.1 in) long by 1.5 mm (0.06 in) thick. On the underside of the caps are widely spaced white gills, attached to a collar encircling the stalk. The mushrooms grow in groups or clusters on decaying wood such as moss-covered logs and stumps. Spore release is dependent upon sufficient moisture. Dried mushrooms may revive after rehydrating and release spores for up to three weeks, much longer than most gilled mushrooms. Although the mushrooms are not generally considered edible, they produce a unique peroxidase enzyme that is attracting research interest for use in bioengineering applications. (Full article...)
... that depictions of Tobias and the Angel(example pictured), unusually for a religious subject, typically show Tobias's dog?
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Sir Thomas Bodley, founder of the Bodleian Library
The head of the Bodleian Library, the main library at the University of Oxford in England, is known as Bodley's Librarian: both are named after the founder, Sir Thomas Bodley(pictured). Although Oxford had had a university library since about 1320, it had declined by the end of the 16th century, so Bodley offered in 1598 to restore it. The first Librarian, Thomas James, was selected in 1599, and the Bodleian opened in 1602. Bodley wanted the Librarian to be diligent, a linguist, unmarried and not a parish priest, although James persuaded him to dispense with the last two requirements. In all, 24 people have served as Bodley's Librarian, some less well than others, with John Price (who held the post from 1768 to 1813) accused of "a regular and constant neglect of his duty". The current Librarian, Sarah Thomas, was appointed in 2007; she is the first woman, and the first foreign librarian, to run the Bodleian. She said that when she saw the job description, "it was love at first sight". (more...)
An oblique shock is a shock wave that, unlike a normal shock, is inclined with respect to the direction of incoming air. It occurs when a supersonic flow encounters a corner that effectively turns the flow into itself and compresses. This photograph shows an oblique shock at the nose of a Northrop T-38 Talon aircraft, made visible through Schlieren photography.
Photograph credit: NASA & US Air Force (J.T. Heineck, Ed Schairer, Maj. Jonathan Orso, Maj. Jeremy Vanderhal)
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